echo get_field_value( ‘Your Field Name here…’ );

You need to add your field name to get the value of that particular field,

This is code, As you said you can add shortcode to page editor, I am sorry but i am not getting how you can you create single post page by using shortcodes in page editor,

There are multiple ways to create a single post page with cubeWP.

1- If you have installed cubeWP frontend pro then you will have a single page builder, and you can create sections and add your required fields using our drag and drop feature and in this way you can create your desired single post page.
If you want to style your single post page and you know the css then you can put their class and container to add css. here is the article where we have explain it,
https://support.cubewp.com/docs/cubewp-framework/cubewp-custom-fields/how-to-apply-custom-css-on-custom-fields/

2- If you are not a developer then you can create single post page using elementor (Free) we have explained it here in this article,
https://support.cubewp.com/docs/cubewp-framework/single-page-template/how-to-create-a-single-page-with-elementor-using-dynamic-tags/

3- If you are a developer you can create single post page as per your design, using our code, We can provide you list of functions to get data.